"Pro" controllers and button mapping

Kinda been kicking the tires on getting a new controller as mine officially has PTSD.

Been looking at these "pro" controllers a little, things like the Edge and Nacon revolution 5

I really dont understand the point of customization button mapping tho?

Can someone give me some good examples of specific games where it's super helpful? Like is it just an extra button where you can map a single button or is it borderline game breaking cheating (like mapping an entire stragem in helldivers 2 or an entire combo in a fighing game to a single button press) also if you had 4 mapable buttons on the back cound you could you do dpad up, down, left, right for each one ?

I like the idea of swapping out sticks and buttons when they get worn and the nacon has weights which seems kinda nifty. $200 seems like a lot of dough tho and the main selling point seems to be extra buttons but I cant think of reason I'd need more buttons.

Also if anyone has any other favorite controllers let me know. Have always just stuck with the official Sony ones.

What led me down this rabbit hole originally is I am an old Xbox user originally from back in the day so the idea of getting the stick above the Dpad sounds great to me

Thanks for all the help